Finding the Fourth Proportional to 1,186.07, 1,636.83 and 662.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,186.07 : 1,636.83 = 662.09 : x
2. Step 2: Convert to fraction form
   1,186.07/1,636.83 = 662.09/x
3. Step 3: Cross multiply
   1,186.07x = 1,636.83 × 662.09
4. Step 4: Simplify right side
   1,186.07x = 1,083,728.77
5. Step 5: Solve for x
   x = 1,083,728.77/1,186.07
6. Step 6: Final answer
   x = 913.71